<template>
<div class="app-container">
<h2 style="text-align: center;">发布新课程</h2>
<el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
<el-step title="填写课程基本信息"/>

<el-step title="创建课程大纲"/>
<el-step title="提交审核"/>
</el-steps>
<el-form label-width="120px">
<el-form-item>

<el-button type="text" @click="openChapter">添加章节</el-button>

    <ul class="chapterList">
            <!-- 章节 -->
        <li v-for="chapter in chapterVideoList" :key="chapter.id">
            <p>{{chapter.title}}
                    <span class="acts">
                            <el-button type="text" @click="openVideo(chapter.id)">添加课时</el-button> 
                            <el-button type="text" @click="editChapter(chapter.id)">编辑</el-button>
                            <el-button type="text" @click="delChapter(chapter.id)">删除</el-button>
                    </span>
             </p>      
            <!--视频  -->
        <ul class="chapterList videoList">
            <li v-for="video in chapter.children" :key="video.id">
                <p>{{video.title}}
                    <span class="acts">
                            <el-button type="text" @click="editVideo(video.id)">编辑</el-button>
                            <el-button type="text" @click="delVideo(video.id)">删除</el-button>
                    </span>
                </p>

            </li>
        </ul>

        </li>
    </ul>

<!-- 隐藏 添加章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
        <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
        <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

<!-- 隐藏 添加小节表单 -->
   <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
        <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
        <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
        <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
        <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
        </el-radio-group>
        </el-form-item>
         
        <el-form-item label="上传视频">
            <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadVideo'"
            :limit="1"
            class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
            支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
            GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
            MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
            SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
            </el-tooltip>
            </el-upload>
        </el-form-item>


        </el-form>
        <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary"
        @click="saveOrUpdateVideo">确 定</el-button>
    </div>
    </el-dialog>

        <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
        </div>
</el-form-item>
</el-form>
</div>  

 
</template>

<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
import vod from '@/api/edu/vod'

export default {
    data(){
        return{
            saveBtnDisabled : false ,
            chapterVideoList:[],
            courseId:'',
            chapter:{//章节
                title:'',
                sort: 0

            },
            video:{//小节
                title:'',
                sort:0,
                free:false,
                videoSourceId:'',
                videoOriginalName:'',//视频名称
                
            },

            dialogChapterFormVisible:false , //添加菜单 显示按钮
            dialogVideoFormVisible:false ,        //添加小节 显示按钮
            fileList:[],            //集合
            BASE_API: process.env.BASE_API // 接口API地址
            
        }

    },
    created(){
        //获取路由中id值
        if(this.$route.params && this.$route.params.id){
                this.courseId = this.$route.params.id
                  //根据课程id查询章节和小节
                this.getChapterVideo()
        }

    },
    methods:{
        


        //弹出 添加章节页面
        openChapter(){
            this.chapter.title=''
            this.chapter.sort=0
            this.dialogChapterFormVisible=true
        },

        //上一步
        previous(){
             this.$router.push({path:'/course/info/'+this.courseId})
        },
        
        //下一步
        next(){ 
            this.$router.push({path:'/course/publish/'+this.courseId})
        },

        // 获取章节小节
        getChapterVideo(){
            chapter.getChapterTree(this.courseId)
                .then(response =>{
                    this.chapterVideoList =response.data.ChapterVideo
                    console.log(this.chapterVideoList)
                })

        },
 //=======================小节=============================
   //添加小节
    addVideo(){
            

        video.addVideo(this.video)
        .then(response =>{
            this.dialogVideoFormVisible = false
            //提示信息
            this.$message({
                type:'success',
                message:'添加课时成功!'
            })
            //刷新页面
            this.video.videoSourceId = ''
            this.video.videoOriginalName = ''
            this.fileList=[]
            this.getChapterVideo()
        })

    },

    //更新小节 
    updateVideo(){

        video.updateVideo(this.video)
        .then(response =>{
             this.dialogVideoFormVisible = false
            //提示信息
            this.$message({
                type:'success',
                message:'修改课时成功!'
            })
            //刷新页面
            this.getChapterVideo()
        })
    },

   //打开 课时 添加
    openVideo(chapterId){
            //每次打开 课时 清空数据
            this.video={}
        //弹框
        this.dialogVideoFormVisible= true
        //设置章节id
        this.video.chapterId = chapterId
        //设置课程id
        this.video.courseId = this.courseId

    },

    //保存按钮 ---可能是 修改 或添加
    saveOrUpdateVideo(){
        

        if(this.video.id && this.video.chapterId && this.video.courseId){
            //更新
            this.updateVideo()
        }else{
            //新增
        this.addVideo()
        }

    },
    
    //编辑小节 回显数据
    editVideo(videoId){
        this.dialogVideoFormVisible = true
        video.editVideo(videoId)
        .then(response =>{
            this.video = response.data.video
         // this.fileList =[{'name':this.video.videoOriginalName}]     批量删除视频
        })
    },


    //删除小节
    delVideo(videoId){

        this.$confirm('此操作将永久删除讲师记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
    }).then(() => {
        video.delVideo(videoId).then(response =>{
                
            //提示信息
            this.$message({
            type: 'success',
            message: '删除成功!'
            });
            
            //回显信息
            this.getChapterVideo()
        })
        
    }).catch(() => {
        this.$message({
        type: 'info',
        message: '已取消删除'
        });          
    });

    },

//=========================上传视频======================================
//视频上传成功回调
handleVodUploadSuccess(response,file,fileList){
    //赋值视频id
    this.video.videoSourceId =response.data.videoId
    //赋值名称
    this.video.videoOriginalName =file.name


},


//根据id删除视频之前提示框
beforeVodRemove(file,fileList){
    return this.$confirm(`确定移除 ${file.name}？`)
},

//根据id删除视频
handleVodRemove(file,fileList){
    vod.removeById(this.video.videoSourceId)
    .then(response =>{
      
        this.$message({
        type: 'success',
        message: response.message
        })

        this.video.videoSourceId = ''
        this.video.videoOriginalName = ''
        this.fileList=[]
    })

    
},


//批量删除视频id



//视频
 handleUploadExceed(files, fileList) {
this.$message.warning('想要重新上传视频，请先删除已上传的视频')
},

//================================章节====================================
            //添加章节
        addChapter(){
         this.chapter.courseId =this.courseId
            chapter.addChapter(this.chapter)
            .then(response =>{
                //关闭弹框
        this.dialogChapterFormVisible=false
                //提示
            this.$message({
                type:'success',
                message: '添加章节成功!'
            })
                //刷新页面
                this.getChapterVideo()
            })
        },

        //编辑章节
        editChapter(chapterId){
            this.dialogChapterFormVisible = true;
            //根据id回显数据
            chapter.getChapterById(chapterId)
                .then(response =>{
                    this.chapter=response.data.chapter;
                })

        },

        //修改章节
        updateChapter(){
            chapter.updateChapter(this.chapter)
            .then(response =>{
                     //关闭弹框
          this.dialogChapterFormVisible=false
                //提示
            this.$message({
                type:'success',
                message: '修改章节成功!'
            })
                //刷新页面
                this.getChapterVideo()
            })

        },
    
        //删除章节
        delChapter(chapterId){
            this.$confirm('此操作将永久删除讲师记录, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
        }).then(() => {
            chapter.delChapter(chapterId).then(response =>{
                    
                //提示信息
                this.$message({
                type: 'success',
                message: '删除成功!'
                });
                
                //回显信息
                this.getChapterVideo()
            })
            
        }).else(()=>{
                //提示信息
                this.$message({
                type: 'info',
                message: '删除失败,章节中有未删除的课时!'
                });
                
                //回显信息
                this.getChapterVideo()

        }).catch(() => {
            this.$message({
            type: 'info',
            message: '已取消删除'
            });          
        });

        },


        //保存按钮
        saveOrUpdate(){
            if(!this.chapter.id){
                this.addChapter()
            }else{
                this.updateChapter()
            }
        
        }

    }
}
</script>

<style scoped>
.chapterList{
 position: relative;
 list-style: none;
 margin: 0;
 padding: 0;
}
.chapterList li{
    position: relative;
}
.chapterList p{
 float: left;
 font-size: 20px;
 margin: 10px 0;
 padding: 10px;
 height: 70px;
 line-height: 50px;
 width: 100%;
 border: 1px solid #DDD;
}
.chapterList .acts {
 float: right;
 font-size: 14px;
}
.videoList{
 padding-left: 50px;
}
.videoList p{
 float: left;
 font-size: 14px;
 margin: 10px 0;
 padding: 10px;
 height: 50px;
 line-height: 30px;
 width: 100%;
 border: 1px dotted #DDD;
}
</style>